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Define the point on the x-axis.

Mathematics

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Answer

(-7, 0)

Step-by-step solution

6 steps
  1. Define the point on the x-axis.

    A point on the x-axis has a y-coordinate of 0. Let the required point be P(x,0)P(x, 0).
    The given points are A(2,−5)A(2, -5) and B(−2,9)B(-2, 9).

  2. Use the distance formula.

    The distance formula between two points (x1,y1)(x_1, y_1) and (x2,y2)(x_2, y_2) is D=(x2−x1)2+(y2−y1)2D = \sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}.
    Since point PP is equidistant from AA and BB, we have PA=PBPA = PB.
    Squaring both sides, we get PA2=PB2PA^2 = PB^2.

  3. Set up the equation for PA2=PB2PA^2 = PB^2.

    (x−2)2+(0−(−5))2=(x−(−2))2+(0−9)2(x-2)^2 + (0-(-5))^2 = (x-(-2))^2 + (0-9)^2 (x−2)2+(5)2=(x+2)2+(−9)2(x-2)^2 + (5)^2 = (x+2)^2 + (-9)^2
  4. Expand and simplify the equation.

    (x2−4x+4)+25=(x2+4x+4)+81(x^2 - 4x + 4) + 25 = (x^2 + 4x + 4) + 81 x2−4x+29=x2+4x+85x^2 - 4x + 29 = x^2 + 4x + 85
  5. Solve for xx.

    Subtract x2x^2 from both sides:

    −4x+29=4x+85-4x + 29 = 4x + 85

    Subtract 4x4x from both sides:

    −4x−4x+29=85-4x - 4x + 29 = 85 −8x+29=85-8x + 29 = 85

    Subtract 29 from both sides:

    −8x=85−29-8x = 85 - 29 −8x=56-8x = 56

    Divide by −8-8:

    x=56−8x = \frac{56}{-8} x=−7x = -7
  6. State the coordinates of the point.

    The point on the x-axis is P(x,0)P(x, 0), so substituting x=−7x = -7, we get the point as (−7,0)(-7, 0).

    The point on the x-axis equidistant from A(2,−5)A(2, -5) and B(−2,9)B(-2, 9) is (−7,0)\boxed{(-7, 0)}.

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